There’s a wireless key fob. Carry it and you start the engine, by twisting a switch. The 2.0-liter, 140-hp engine can be attached to an automated continuously variable transmission. A CVT’s wide gear ratios should improve fuel economy. It works, but sometimes lets the engine whine annoyingly. It also bumped (slowing down) and lurched (turning takeoff). In contrast, the Spec V’s 2.5-liter, 200-hp mill and clumsy-shifting, six-speed manual tranny were lively.

Sentras ride softly. Steering is lackluster. It’s initially firm, becomes too light off center, and then stiffens, as one tightens the arc. Add excessive body roll and you’ve got a sloppy, tipsy handling buggy. The sports-tuned V is better. Stability control isn’t available on the 2.0 S tester. For 2010, vehicle dynamic control (recommended) is standard on the SL, SE-R and SE-R Spec V, Standard antilock brakes worked well.